fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph
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268 lines
9.2 KiB
268 lines
9.2 KiB
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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#include "db/blob/blob_file_cache.h"
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#include <cassert>
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#include <string>
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#include "db/blob/blob_log_format.h"
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#include "db/blob/blob_log_writer.h"
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#include "env/mock_env.h"
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#include "file/filename.h"
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#include "file/read_write_util.h"
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#include "file/writable_file_writer.h"
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#include "options/cf_options.h"
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#include "rocksdb/cache.h"
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#include "rocksdb/env.h"
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#include "rocksdb/file_system.h"
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#include "rocksdb/options.h"
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#include "rocksdb/statistics.h"
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#include "test_util/sync_point.h"
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#include "test_util/testharness.h"
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namespace ROCKSDB_NAMESPACE {
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namespace {
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// Creates a test blob file with a single blob in it.
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void WriteBlobFile(uint32_t column_family_id,
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const ImmutableOptions& immutable_options,
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uint64_t blob_file_number) {
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assert(!immutable_options.cf_paths.empty());
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const std::string blob_file_path =
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BlobFileName(immutable_options.cf_paths.front().path, blob_file_number);
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std::unique_ptr<FSWritableFile> file;
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ASSERT_OK(NewWritableFile(immutable_options.fs.get(), blob_file_path, &file,
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FileOptions()));
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std::unique_ptr<WritableFileWriter> file_writer(new WritableFileWriter(
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std::move(file), blob_file_path, FileOptions(), immutable_options.clock));
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constexpr Statistics* statistics = nullptr;
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constexpr bool use_fsync = false;
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constexpr bool do_flush = false;
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BlobLogWriter blob_log_writer(std::move(file_writer), immutable_options.clock,
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statistics, blob_file_number, use_fsync,
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do_flush);
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constexpr bool has_ttl = false;
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constexpr ExpirationRange expiration_range;
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BlobLogHeader header(column_family_id, kNoCompression, has_ttl,
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expiration_range);
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ASSERT_OK(blob_log_writer.WriteHeader(header));
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constexpr char key[] = "key";
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constexpr char blob[] = "blob";
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std::string compressed_blob;
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uint64_t key_offset = 0;
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uint64_t blob_offset = 0;
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ASSERT_OK(blob_log_writer.AddRecord(key, blob, &key_offset, &blob_offset));
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BlobLogFooter footer;
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footer.blob_count = 1;
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footer.expiration_range = expiration_range;
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std::string checksum_method;
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std::string checksum_value;
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ASSERT_OK(
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blob_log_writer.AppendFooter(footer, &checksum_method, &checksum_value));
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}
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} // anonymous namespace
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class BlobFileCacheTest : public testing::Test {
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protected:
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BlobFileCacheTest() { mock_env_.reset(MockEnv::Create(Env::Default())); }
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std::unique_ptr<Env> mock_env_;
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};
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TEST_F(BlobFileCacheTest, GetBlobFileReader) {
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Options options;
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options.env = mock_env_.get();
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options.statistics = CreateDBStatistics();
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options.cf_paths.emplace_back(
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test::PerThreadDBPath(mock_env_.get(),
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"BlobFileCacheTest_GetBlobFileReader"),
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0);
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options.enable_blob_files = true;
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constexpr uint32_t column_family_id = 1;
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ImmutableOptions immutable_options(options);
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constexpr uint64_t blob_file_number = 123;
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WriteBlobFile(column_family_id, immutable_options, blob_file_number);
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constexpr size_t capacity = 10;
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std::shared_ptr<Cache> backing_cache = NewLRUCache(capacity);
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FileOptions file_options;
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constexpr HistogramImpl* blob_file_read_hist = nullptr;
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BlobFileCache blob_file_cache(backing_cache.get(), &immutable_options,
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&file_options, column_family_id,
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blob_file_read_hist, nullptr /*IOTracer*/);
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// First try: reader should be opened and put in cache
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CacheHandleGuard<BlobFileReader> first;
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ASSERT_OK(blob_file_cache.GetBlobFileReader(blob_file_number, &first));
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ASSERT_NE(first.GetValue(), nullptr);
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ASSERT_EQ(options.statistics->getTickerCount(NO_FILE_OPENS), 1);
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ASSERT_EQ(options.statistics->getTickerCount(NO_FILE_ERRORS), 0);
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// Second try: reader should be served from cache
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CacheHandleGuard<BlobFileReader> second;
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ASSERT_OK(blob_file_cache.GetBlobFileReader(blob_file_number, &second));
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ASSERT_NE(second.GetValue(), nullptr);
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ASSERT_EQ(options.statistics->getTickerCount(NO_FILE_OPENS), 1);
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ASSERT_EQ(options.statistics->getTickerCount(NO_FILE_ERRORS), 0);
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ASSERT_EQ(first.GetValue(), second.GetValue());
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}
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TEST_F(BlobFileCacheTest, GetBlobFileReader_Race) {
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Options options;
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options.env = mock_env_.get();
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options.statistics = CreateDBStatistics();
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options.cf_paths.emplace_back(
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test::PerThreadDBPath(mock_env_.get(),
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"BlobFileCacheTest_GetBlobFileReader_Race"),
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0);
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options.enable_blob_files = true;
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constexpr uint32_t column_family_id = 1;
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ImmutableOptions immutable_options(options);
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constexpr uint64_t blob_file_number = 123;
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WriteBlobFile(column_family_id, immutable_options, blob_file_number);
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constexpr size_t capacity = 10;
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std::shared_ptr<Cache> backing_cache = NewLRUCache(capacity);
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FileOptions file_options;
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constexpr HistogramImpl* blob_file_read_hist = nullptr;
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BlobFileCache blob_file_cache(backing_cache.get(), &immutable_options,
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&file_options, column_family_id,
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blob_file_read_hist, nullptr /*IOTracer*/);
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CacheHandleGuard<BlobFileReader> first;
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CacheHandleGuard<BlobFileReader> second;
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SyncPoint::GetInstance()->SetCallBack(
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"BlobFileCache::GetBlobFileReader:DoubleCheck", [&](void* /* arg */) {
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// Disabling sync points to prevent infinite recursion
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SyncPoint::GetInstance()->DisableProcessing();
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ASSERT_OK(blob_file_cache.GetBlobFileReader(blob_file_number, &second));
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ASSERT_NE(second.GetValue(), nullptr);
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ASSERT_EQ(options.statistics->getTickerCount(NO_FILE_OPENS), 1);
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ASSERT_EQ(options.statistics->getTickerCount(NO_FILE_ERRORS), 0);
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});
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SyncPoint::GetInstance()->EnableProcessing();
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ASSERT_OK(blob_file_cache.GetBlobFileReader(blob_file_number, &first));
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ASSERT_NE(first.GetValue(), nullptr);
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ASSERT_EQ(options.statistics->getTickerCount(NO_FILE_OPENS), 1);
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ASSERT_EQ(options.statistics->getTickerCount(NO_FILE_ERRORS), 0);
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ASSERT_EQ(first.GetValue(), second.GetValue());
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SyncPoint::GetInstance()->DisableProcessing();
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SyncPoint::GetInstance()->ClearAllCallBacks();
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}
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TEST_F(BlobFileCacheTest, GetBlobFileReader_IOError) {
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Options options;
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options.env = mock_env_.get();
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options.statistics = CreateDBStatistics();
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options.cf_paths.emplace_back(
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test::PerThreadDBPath(mock_env_.get(),
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"BlobFileCacheTest_GetBlobFileReader_IOError"),
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0);
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options.enable_blob_files = true;
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constexpr size_t capacity = 10;
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std::shared_ptr<Cache> backing_cache = NewLRUCache(capacity);
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ImmutableOptions immutable_options(options);
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FileOptions file_options;
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constexpr uint32_t column_family_id = 1;
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constexpr HistogramImpl* blob_file_read_hist = nullptr;
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BlobFileCache blob_file_cache(backing_cache.get(), &immutable_options,
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&file_options, column_family_id,
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blob_file_read_hist, nullptr /*IOTracer*/);
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// Note: there is no blob file with the below number
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constexpr uint64_t blob_file_number = 123;
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CacheHandleGuard<BlobFileReader> reader;
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ASSERT_TRUE(
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blob_file_cache.GetBlobFileReader(blob_file_number, &reader).IsIOError());
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ASSERT_EQ(reader.GetValue(), nullptr);
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ASSERT_EQ(options.statistics->getTickerCount(NO_FILE_OPENS), 1);
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ASSERT_EQ(options.statistics->getTickerCount(NO_FILE_ERRORS), 1);
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}
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TEST_F(BlobFileCacheTest, GetBlobFileReader_CacheFull) {
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Options options;
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options.env = mock_env_.get();
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options.statistics = CreateDBStatistics();
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options.cf_paths.emplace_back(
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test::PerThreadDBPath(mock_env_.get(),
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"BlobFileCacheTest_GetBlobFileReader_CacheFull"),
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0);
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options.enable_blob_files = true;
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constexpr uint32_t column_family_id = 1;
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ImmutableOptions immutable_options(options);
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constexpr uint64_t blob_file_number = 123;
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WriteBlobFile(column_family_id, immutable_options, blob_file_number);
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constexpr size_t capacity = 0;
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constexpr int num_shard_bits = -1; // determined automatically
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constexpr bool strict_capacity_limit = true;
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std::shared_ptr<Cache> backing_cache =
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NewLRUCache(capacity, num_shard_bits, strict_capacity_limit);
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FileOptions file_options;
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constexpr HistogramImpl* blob_file_read_hist = nullptr;
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BlobFileCache blob_file_cache(backing_cache.get(), &immutable_options,
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&file_options, column_family_id,
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blob_file_read_hist, nullptr /*IOTracer*/);
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// Insert into cache should fail since it has zero capacity and
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// strict_capacity_limit is set
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CacheHandleGuard<BlobFileReader> reader;
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ASSERT_TRUE(blob_file_cache.GetBlobFileReader(blob_file_number, &reader)
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.IsIncomplete());
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ASSERT_EQ(reader.GetValue(), nullptr);
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ASSERT_EQ(options.statistics->getTickerCount(NO_FILE_OPENS), 1);
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ASSERT_EQ(options.statistics->getTickerCount(NO_FILE_ERRORS), 1);
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}
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} // namespace ROCKSDB_NAMESPACE
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int main(int argc, char** argv) {
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::testing::InitGoogleTest(&argc, argv);
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return RUN_ALL_TESTS();
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}
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